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Gain from Sale of Office Premises (Details) (USD $)
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Gain (Loss) on Sale of Property Plant Equipment [Abstract]      
Gross proceeds from sale of office premises $ 7,512,000    
Gain from sale of office premises $ 5,185,000 $ 0 $ 0